Observation by Kevin Gurney: The Bubble Nebula in Narrowband

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Observer

Kevin Gurney

Observed

2019 Jun 17 - 22:00

Uploaded

2019 Jul 13 - 09:25

Objects

The Bubble Nebula (NGC7635)

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Constellation

Cassiopeia

Field centre

RA: 23^h20^m
Dec: +61°11'
Position angle: -1°47'

Field size

0°19' × 0°22'

Equipment

Celestron 8SE scope
ZWO ASI1600MM-Pro Cool camera

Exposure

Baader Planetarium Ha 1.25" 7nm: 10x300" -20C bin 1x1 Baader Planetarium OIII 1.25" 8.5nm: 10x300" -20C bin 1x1 Baader Planetarium S2 1.25" 8nm: 10x300" -20C bin 1x1

Location

Embourie, Charente, France

Target name

NGC 7635

Title

The Bubble Nebula in Narrowband

About this image

Kevin captured this narrowband image of NGC 7635 (bubble nebula) in France under a reportedly "beautiful clear sky", but a full moon, so narrowband was the only option.

The nominal palette is Ha = red, OIII = blue, SII = Green (although there isn't much at SII to be honest). The eventual colour mix with Ha more 'orangy', occurs to get a good colour balance for stars in Pixinsight. The blue then mixes with this to give a purple(ish) central region where any OII occurs.

Details are:

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Bubble Nebula: NGC 7635

17th June 2019

Embourie, Charente, France

Kit:
Imaging telescope or lens:Celestron 8SE
Imaging camera:ZWO ASI1600MM-Pro Cool
Mount:SkyWatcher AZ-EQ6GT
Focal reducer:ASA 2" Reducer Corrector 0,77
Software:XnView, Hyperion Prism v10, PixInsight 1.8 Ripley
Filters:Baader Planetarium S2 1.25" 8nm, Baader Planetarium Ha 1.25" 7nm, Baader Planetarium OIII 1.25" 8.5nm

Files associated with this observation

wk29_19_n7635_gurney.jpg (112.5 kB)

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